import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

public class demo8 {
    public static void main(String[] args){
        try(InputStream inputStream=new FileInputStream("d:/test.txt")){
            byte[] buffer=new byte[1024];
            int n=inputStream.read(buffer);
            System.out.println("n:"+n);
            for(int i=0;i<n;i++){
                System.out.printf("%x\n",buffer[i]);
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
